<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
    
        var obj1 = {name:'jack',age:18};
        var obj2 = {sex:'男'};
        //需求 希望obj2继承obj1的属性和方法
        //混入式
        for(var k in obj1) {
            obj2[k] = obj1[k];
        }
    
        console.log(obj2);

        //像这种方式称之为 混入式 继承
        
    </script>
</body>
</html>